Gyratory rock crusher



March 31, 1970 J. G. DALY 3,503,563

GYRATORY ROCK GRUSHER Filed May 2, 1968 2 Sheets-Sheet 1 FIG! INVENTOR JAMES G. DA LY March 1970 I J. G. DALY 3,503,563

GYRATORY ROCK CRUSHER Filed May 2, 1968 2 Sheets-Sheet 2 R L) [I INVENTOR JAMES G. DALY A ORNEY United States Patent 3,503,563 GYRATORY ROCK CRUSHER James G. Daly, Chicago, Ill., assignor t0 Westinghouse Air Brake Company, Pittsburgh, Pa., a corporation of Pennsylvania Filed May 2, 1968, Ser. No. 726,193 Int. Cl. B02c 4/12, 2/08 US. Cl. 241-204 5 Claims ABSTRACT OF THE DISCLOSURE REFERENCES TO PRIOR STRUCTURES This invention is an improvement in the gyratory roll crusher of my application Ser. No. 530,035, filed Feb. 25, 1966, and entitled Rock Crusher, now abandoned.

SUMMARY AND OBJECTS OF THE INVENTION Gyratory crusher arranged to crush rocks into small sizes approximating sand where required and providing closed crushing areas on opposite sides of the gyratory crusher roll, in which the crusher jaws have convex crusher faces of equal areas, to attain a greater reduction in size of the rock and to prevent clogging between the crusher roll and crusher jaws.

A principal object of the invention is to provide a simpler form of gyratory crusher arranged with a view toward utmost efliciency in construction with a resultant reduction in clogging between the crusher roll and crusher jaws and the ability of the crusher to reduce rock and the like to finer sizes than has heretofore been attained by prior gyratory crushers.

Another object of the invention is to improve upon the gyratory crushers heretofore in use, by providing convex crusher jaws on opposite sides of a gyratory crusher roll, to reduce the final product to smaller sizes than has heretofore been possible with gyratory types of crushers, and to eliminate clogging of the material between the gyratory crusher rolls and crusher jaws.

A further object of the invention is to provide an improved form of horizontal axis gyratory roll crusher in which the efficiency of crushing is increased and the liability of clogging between the jaws and gyratory crusher roll is reduced by providing diametrically opposed crushing zones on opposite sides of the gyratory roll formed by identical crusher jaws having convex faces of equal areas.

These and other objects of the invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings.

DESCRIPTION OF THE DRAWINGS FIGURE 1 is a transverse sectional view of a horizontal axis gyratory roll crusher constructed in accordance with the principles of the present invention; and

FIGURE 2 is a fragmentary transverse sectional view taken substantially along line 2-2 of FIGURE 1.

DESCRIPTION OF PREFERRED EMBODIMENT OF INVENTION In FIGURES 1 and 2 of the drawings, I have shown a gyratory roll crusher constructed along lines somewhat 3,503,563 Patented Mar. 31, 1970 similar to the crusher of my aforementioned application Ser. No. 530,035. The details of construction of the crusher, therefore, are similar to those of the crusher of my prior application, except similar crusher jaws 11, 11 are provided on opposite sides of a gyratory crusher roll 12, in diametrically opposed relation with respect to each other. Said crusher jaws may advantageously be identical, although they need not necessarily be identical. The gyratory crusher roll 12 is supported within a housing 13 on an eccentric drive shaft 15 for free rotation with respect thereto to effect gyratory movement of the crusher roll 12 back and forth between the two crusher jaws 11, 11, as shown and described in my application Ser. No. 530,035, previously mentioned. The housing 13 has parallel spaced side walls 16, 16 extending upwardly from a base 17 having a central open portion 18 for the discharge of aggregate therethrough. The side walls 16, 16 are suitably tied together as by tie bars 15 15 at opposite ends of said side walls. Vertical abutment plates 19 extend between the side walls 16 adjacent opposite ends thereof and are backed up by horizontally extending bracing plates 20, extending between the side walls 16 and abutting and welded or otherwise secured to the outer sides of the abutment plates 19.

The base 17 and side walls 16, 16 form supports for aligned bearing boxes 21, 21 for bearings (not shown) for the eccentric drive shaft 15. The eccentric drive shaft 15 has opposite concentric end portions 22 and 23, with an eccentric intermediate portion 25 forming a mounting for the gyratory crusher roll 12, on suitable bearings (not shown) in a manner similar to that shown and described in my aforementioned application Ser. No. 530,035. A flywheel 26 is keyed or otherwise secured to the concentric end 23 of the eccentric shaft 25 and serves as a counterweight for said shaft. A drive pulley (not shown) or other conventional drive means is secured to the opposite end of said shaft.

Rotation of the shaft will rotate the gyratory crusher roll 12 therewith, under no load conditions, and will also move said gyratory crusher roll back and forth toward and from the crusher jaws 11, 11. Under load conditions, however, the crusher roll will tend to creep in a direction opposite to the direction of rotation of its drive eccentric.

Clamping arms 27, 27 are provided to support the crusher jaws 11 and to accommodate adjustment of said arms towards and from the gyratory roll 12. Said clamping arms are each of the same construction and support'the jaws 11, 11 in a similar manner so one clamping arm only need herein be shown and described, The clamping arm 27 is mounted on a transverse shaft 29, pivotally mounted at its opposite ends in the side walls 16, 16 of the housing 13 adjacent the upper end portions of said side walls, in suitable bearings (not shown). The clamping arm 27 includes a clamping plate 32 and a series of parallel vertically extending ribs 31 extending along and rearwardly of said clamping plate. Horizontal reinforcement ribs 33 extend between the vertically extending ribs 31, and are welded or otherwise secured thereto, and to the rear face of the clamping plate 32. I

The vertically extending parallel ribs 31 have a semicylindrical socket member 35 extending thereacross and having an outwardly opening semi-cylindrical socket 36 formed therein. The socket 36 is engaged by a generally semi-cylindrical end 37 of a toggle link 39. The opposite end of the toggle link 39 has a semi-cylindrical end 40 engaging a semi-cylindrical socket 41 formed in a socket member 42, resting on the top surface of a horizontal plate 43, and backed up by the inner wall of the abutment plate 19 and retained to the plates 43 and 19 by a retainer clamp 44. Shims 45 are interposed between the inner face of the wall 19 and the socket member 42, to

adjust the spacing between the crushing face of an associated crusher jaw and the periphery of the gyratory roll 12. The toggle links 39 extend for substantially the width of the socket member 42 and are of a relatively thin cross section, to break upon excessive loads on the crusher jaws 11, 11, and thereby act as safety links, which may readily be replaceable.

The semi-cylindrica1 ends 37 and 40 of the toggle link 39 are retained to their sockets by a compression spring 47, encircling a tension rod 48 and seated between the rear face of the abutment plate 19 and a nut and washer 49 on the outer end of said tension rod. The tension rod 48 has a clevis 50 on its inner end, extending between spaced bosses 51, 51 extending inwardly of a pair of central vertically extending plates or ribs 31, beneath the toggle link 39, and pivotally connected to said ribs as by a pivot pin 53.

The clamping plate 32 has a flange 55 extending inwardly of the lower end thereof having a gib 56 extending upwardly therefrom. The gib 56 has an inclined upper face conforming to the angle of inclination of an inclined lower face 57 of the associated crusher jaw 11.

The upper end of the crusher jaw 11 has a tapered wedging face 59 inclined oppositely from the face 57 and engaged by a tapered wedging face 60 of a wedge 61. The wedge 61 extends across the ribs 31 and engages wedging faces 62 thereof, and is drawn toward the clamping plate 32, to wedge the crusher jaw 11 into tight engagement with the inner face of said clamping plate, as by nuts and bolts 63, extending through said wedge and through the clamping plate 32, and tightened from the outer side of said clamping plate.

The vertical ribs 31 have the horizontal legs of angle plates 65 extending across the top surfaces thereof and secured thereto. The vertical legs of said angle plates are positioned to extend downwardly along the inner sides of the ribs 31 to positions adjacent the wedges 61, 61 to close the space from the top of the crusher to the crusher jaws 11, 11 and to cooperate with the crusher jaws to form the end walls of a hopper 66. Side plates 67, 67 extend between the vertical legs of the angle plates 65, 65 on each side of the crusher on the outer sides of said vertical legs and cooperate with said vertical legs to form the side walls of the hopper. Plates 69, 69 extend downwardly of the side plates 67, 67 along opposite sides of the gyratory crusher roll 12 and terminate into arcuate faces 70, 70 extending radially inwardly of the periphery of the gyratory crusher roll 12 along opposite ends thereof and cooperating therewith and with the crusher jaws 11, 11, to retain rock to said crusher jaws to be crushed by the gyratory motion of the crusher roll 12 toward and from said crusher jaws.

Each crusher jaw 11 is of a similar construction and is symmetrical about its transverse center to enable the jaws to be reversed upon the tendency of the jaws to wear. As shown in FIGURE 1, the crusher jaws 11 each have a convex crushing face 71 having generally identical crushing areas, positioned in the required spaced relation with respect to the periphery of the gyratory roll 12, by adding or taking out shims 45 between the abutment plate 19 and the back wall of the socket member 42.

With the construction just described, when the hopper 66 is loaded with rock, and the eccentric shaft is rotatably driven, the crusher roll 12 will be given a back and forth gyratory motion toward and from the crushing faces 71 of the convex crushing jaws 11, 11 and at the same time will tend to rotate in a direction opposite to the direction of rotation of the eccentric drive shaft 15.

The gyratory crusher roll 12 is shown in one mean horizontal position in FIGURE 1, with its axis of rotation A spaced to one side of the axis of rotation B of the shaft 15 along a horizontal line C intersecting the axis of rotation of the shaft 15. When in this or in an opposite mean position, the apices of the convex crusher faces 71 of the crusher jaws 11 are spaced above line C a distance sufficient to maintain a diverging zone beneath line C in all positions of adjustment of the crusher jaws 11 with respect to the periphery of the gyratory crusher roll 12. This assures self cleaning of the crusher jaws and avoids choking on the uprunning side of the drive eccentric, and enables the rock to be efficiently reduced to finer sizes than has heretofore been possible with crushers of the gyratory type.

While I have herein shown and described one form in which the invention may be embodied, it may readily be understood that various variations and modifications in the invention may be attained without departing from the spirit and scope of the novel concepts thereof.

I claim as my invention:

1. In a crusher for rock and the like,

a housing,

a gyratory crusher roll within said housing and rotatable about a horizontal axis,

eccentric drive means for said roll extending along the axis of said roll and rotatably driven about a horizontal axis, and supporting said roll for free rotation about the axis of said roll and for gyratory movement about the axis of said eccentric drive means,

a pair of crusher jaws supported in close proximity to and at opposite sides of said gyratory crusher roll, and each having a crushing face,

the crushing faces of said jaws being convex.

2. A crusher in accordance with claim 1,

wherein the crushing areas of said crushing jaws are substantially identical,

wherein clamping brackets are pivotally mounted in said housing adjacent the upper end portion thereof on opposite sides of said gyratory crusher roll,

wherein means are provided for clamping said crushing jaws to said clamping brackets, and

wherein said clamping brackets are movable toward and from the periphery of said crusher roll to adjust the spacing between the convex faces of said crushing jaws and the periphery of said crusher roll.

3. A crusher in accordance with claim '2,

wherein said crushing jaws are symmetrical about the transverse center thereof and are invertible to compensate for wear thereon.

4. A gyratory crusher in accordance with claim 3,

wherein the transverse centers of said crushing jaws are disposed above the mean horizontal position of the axis of said gyratory crusher roll, a distance sufiicient to provide an elficient crushing action, and reduction of the rock to uniform fine sizes, and to attain diverging areas beneath said line in all positions of adjustment of said crusher jaws with respect to said crusher roll to assure freedom of choking between said crusher jaws and crusher roll.

5. A crusher for rock and the like in accordance with claim 3,

wherein toggle links pivoted between said crusher jaws and housing retain said crusher jaws in fixed relation with respect to said gyratory crusher roll,

wherein spring means bias said crusher jaws into engagement with said toggle links, and

wherein the means for adjusting said crusher jaws comprise shims for varying the spacing between the faces of said crusher jaws and the periphery of said gyratory roll.

References Cited UNITED STATES PATENTS 2,582,734 1/1952 Adams 241-139 JAMES M. MEISTER, Primary Examiner 

